Door lock and signal.



N. SILVERSON. DOOR LOCK AND SIGNAL. APPLIoATIoN FILED ooT.a1,19o8.

1,037,674. Patented Septf 3, 1912.

g E f iw UNITED sTATEs PATENT oEEIoE. i'

NATHAN SILVERSON, OF NEW YORK, N. Y.

DOOR LOCK AND SIGNAL.

To all 107mm t may concern: Y

Be it known that I, NATHAN SILvERsoN, of New York, in the county of NewYork and State of New York, have invented certain new and usefulImprovements in Door Locks and Signals; and I do hereby declare thefollowing to be a full, clear, and eXact description of the. invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

lIhis invention contemplates the provision of a combined lock and signalprimarily designed for doors.

In the accompanying drawing, Figure 1 shows the lock case removed and inside elevation. Fig. 2 is a vertical transverse sectional view showingthe door attachment, the lock and signal. Fig. 3 is a fragmentary Viewshowing the inner side of the face plate.

Referring to the drawing, 1 designates the door attachment of well knowndesign, such as a Yale or other form of cylinder lock, to which lockingand signaling mechanism embodying my invention is appropriate. The bar 2which is turned axially by the key 3 operates the lock in the usualmanner and the only modication or alternation in the outer portion orkey hole member which I have found advisable is for the purpose ofmounting the bell knob 4L. As shown, the ring 5 is formed with anapertured ear 6 of less thickness than the ring through which ear andthe door the shaft or spindle 7 eX- tends, the iiange portion of thering 5 being interrupted at the point of location of the ear. The shaft7 carrying knob t at its outer end has a shoulder 7a which contacts withear 6 and extends into the opening in the iiange of the ring caused bythe interruption thereof. `When the plate 8 is seated upon ring 5 itholds shoulder 7a between itself and ear 6, thus providing simple meansfor preventing the withdrawal of the spindle 7.

In the form of locking mechanism illustrated in Fig. 1, 9 is the bolt,10 the tumbler and 12 the lever. These parts, as well as the signal 18,are mounted in a lock case 14 designed to be secured to the inner faceof the door. The bolt 9 is formed near its rear end with a longitudinalslot 15 through which projects a stud 16 cast in the lock case, thusproviding a bearing for the bolt in its sliding movement. A spring 17 isshown bearing against the top edge of the bolt and l Specification ofLetters Patent.

Application filed October 31, 1908.

Patented Sept. 3, 1912.

Serial N o. 460,433.

formed with a bent portion as at 18. When the bolt slides in eitherdirection its projecting surface 19 contacting with the spring ridesover the bent portion thereof and the spring thus tends to air themovement of the bolt and maintain it in a uniform plane.

The tumbler 10 is pivotally mounted upon, and movable-with, the bolt.Its rearward arm 2O is formed at its extremity with a locking nib 21projecting over slot 15 and designed to engage the stud 16 by the nibcontacting with one or the other edge of the stud according as the boltis shot or retracted. The tumbler is held in the position to performthis function by a plate spring 22 carried by the bolt and bearing uponthe forward arm 23 of t-he tumbler. On its lower edge the bolt has aratchet tooth 24 meshing with a pinion 25 forming part of the signaldevice, the pinion meshing with gearing mounted upon an axle 26 on whichthe bell clappers are carried. Near its forward end the lower edge ofthe bolt is formed with a recess 27 to receive the bifurcated extremity28 of the lever 12. 'Ihis lever is pivotally mounted as at 29 and isformed with a curved surface as at 30 with which contacts the cam 31mounted on the face plate. (See Fig. 3.) rlhis cam is movable by the bar2 which turns axially with the key. The lever 12 has a finger piece 33extending through the lock casing. This enables the lock to be thrown orretracted by hand from the inner side of the door.

From the foregoing it will be obvious that the reciprocation of the boltcauses the signal to sound through the medium of the tooth 24 and pinion25, whether the bolt be shot or retracted by hand at 33 or by the key.Vvlhen the bolt is to be retracted the arm 28 of the lever 12 contactswith the tumbler 10, tilting the latter against the tension of spring 22and moving the nib 21 out of engagement with the stud 16. `In its travelthe bolt encounters the bent portion 18 of spring 17 and passes over thelatter by the time it reaches the limit of travel, the spring tending tomaintain the bolt in position to engage the pinion. The locking nib 21will then have reached the other side of the stud 16 and upon the leverarm 28 releasing the tumbler the spring 22 will return the tumbler toits normal position and the nib 21 will again hold the bolt.

It is desirable that the door be capable of standing slightly ajar, astor rentilating purposes, and yet held as against opening suiiicientlyto allow a person to enter. lt is also desirable that the signal besounded in the event of an etlort being made to fully open the door. laccomplish these purposes by means of an arm 35 pivotally mounted in theloch case as at 8G and held by a stout spring' 3T. I hare shown the armcurved to term a substantially horizontal portion 38 equipped withratchet teeth designed to mesh with the pinion A projection on theportion 3S oi' this arm is designed to hold one end of a chain passedthrough a slot L.t0 in the lock easing, the other end of the chain beingconnected to the door traine. The ,Y et the :hein may be such as to notallow the door to open siii'liioiently to admit a person and thestrength of the spring 3l may withstand ordinar-y ijnessure sneh as thatcreated by a draft of air, but when the door is pushed suificiently hardfrom uit/hout to overcome the resistance of the spring Ahe arm willswing and its teeth engagiuf e ratchet will turn the latter anc ind the.alarm. rlhe signal may, of coarse, be operated as a door bellindependently of the look by means of knob el on shaft or spindle 7.

This shaft enters the square opening 1li-2, in the pinion 25 and ringsthe bell upon being turned axially.

l have illustrated my invention as applied to a lock which requiresmanipulation to move it in either direction, but ob yiously it isequally adapted to latches in which the bolt is normally shot orextended.

l olaim as my invention zvln a lock and signal device, the combinationwith the look case having a bell, an axle, chipper-sis mounted upon saidaille and a pinion for rotating said axle, ot a sliding bolt having asingle tooth designed to enand rotate said pinion in its slidingmovements, key controlled mechanism for extending and retraoting saidbolt, a shalt engaging said pinion and a knob carried by said shaft,whereby said bell may be sounded independently ot said key controlledmechanism.

ln testimony whereof, I have signed this specification in the presenceof two subscribing Witnesses.

NATHAN SILVERSGN.

lVitnesses W. A. TENNEY, GRAFTON L. MCGILL.

Contes of this patent may be obtained fol` ve cents each, by addressingthe Commissioner of Patents. Vashngton. D. C.

